Line Pressure Test

Line Pressure Test








CAUTION: Carry out the Line Pressure Test prior to carrying out the Stall Speed Test. If the line pressure is low at stall, do not carry out Stall Speed Test or further transmission damage will occur. Do not maintain wide open throttle (WOT) in any transmission range for more than five seconds.

This test verifies that the line pressure is within specification.

1. Connect a pressure gauge to the line pressure tap.
2. Start the engine and check line pressures. Refer to the Line Pressure Chart to determine if line pressure is within specification.

Line Pressure Chart

3. Place the ignition switch in the OFF position. If line pressure is not within specification, check EPC pressure.
4. Connect a pressure gauge to the EPC pressure tap.
5. Start the engine and check EPC pressure. Use the line pressure chart for specifications.
6. If the EPC pressure is not within specification, GO to Pinpoint Test E to diagnose the EPC operation. Test E: Output Shaft Speed (OSS) Sensors If the EPC operation is OK, refer to the Line Pressure Diagnosis Chart for line pressure concern causes.





Line Pressure Diagnosis Chart